package com.itheima;

import org.junit.Test;

import java.util.Comparator;
import java.util.HashMap;
import java.util.TreeMap;

import static com.itheima.MapDemo.test2;

/**
 * @ProjectName: ybxy6
 * @Titile: TreeMapDemo
 * @Author: 鲁伍加
 * @Description: TODO
 */
public class TreeMapDemo {
    public static void main(String[] args){
        test2();
    }
    public static void test2() {
        TreeMap<Student, String> treeMap = new TreeMap<>(new Comparator<Student>() {
            @Override
            public int compare(Student o1, Student o2) {
                return o2.getAge() - o1.getAge();
            }
        });
        treeMap.put(new Student("张三", 18), "广州");
        treeMap.put(new Student("李四", 19), "深圳");
        treeMap.put(new Student("王五", 20), "北京");
        treeMap.put(new Student("赵六", 21), "上海");
        treeMap.put(new Student("孙七", 22), "四川");
        treeMap.forEach((k,v)-> System.out.println(k + ":" + v));
    }
    @Test

    public void test1() {
        TreeMap<Student, String> treeMap = new TreeMap<>();
        treeMap.put(new Student("张三", 18), "广州");
        treeMap.put(new Student("李四", 19), "深圳");
        treeMap.put(new Student("王五", 20), "北京");
        treeMap.put(new Student("赵六", 21), "上海");
        treeMap.put(new Student("孙七", 22), "四川");
        treeMap.forEach((k,v)-> System.out.println(k + ":" + v));
        HashMap<String, String> hashMap = new HashMap<>();
    }
}
